Write balanced equations that described the formation of thefollowing compounds

Question

Write balanced equations that described the formation of thefollowing compounds from elements in their standard states and usethe appendix C to obtain the values of their standard enthalpies offormation (a) HBr (g), (b) AgNO3(s).

Explanation / Answer

a)for the formation of HBr reactants used are hydrogen (H2(g) + bromineBr2(g)) Br2(g) + hv -> Br + Br Br + H2 ->HBr + H H + Br2 -> HBr + Br H + HBr -> H2 + Br2 Br + Br -> Br2 now so the overall reaction is: H2+Br2 -> 2HBr b)for the formation of AgNO3 reaction is as follows:Ag (s) + 1/2(N2) (g) + 3/2O2(g)----> AgNO3 (s) now the reaction enthalpies of formation are:: A) HBr -> -36.29 kj/mol b) AgNO3 -> -45.06 kj/mol

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